Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2005-12-27
2005-12-27
Chin, Stephen (Department: 2634)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S340000, C375S316000
Reexamination Certificate
active
06980608
ABSTRACT:
A digital signal detector converts quantized modulation signals to digital data according to a plurality of discriminating conditions which are set by shifting phases, which are to be boundaries of discrimination, from each other. Predetermined data in the digital data are combined so that the phases used for discriminating the data rotate in time series, thereby constituting a plurality of comparison data. When a plurality of comparison data strings coincides with expected data strings, predetermined data strings can be detected. Since a plurality of comparison data strings corresponding to a plurality of frequency differences are compared with expected data strings by a plurality of discriminating units, data strings with frequency differences can be simultaneously detected, which results in shortening the time required for detection.
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patent: 6108525 (2000-08-01), Takemura
patent: 6625239 (2003-09-01), Shiraishi et al.
patent: 6717993 (2004-04-01), Shiraishi et al.
patent: 11-55149 (1999-02-01), None
European Search Report dated Jul. 9, 2004 for EP 01301776.
Chin Stephen
File Erin M.
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